.active-button a {
    position: relative;
    display: inline-block;
    padding: 0 75px;
    color: #2e7c52;
    font-size: 16px;
    text-decoration: none;
    text-transform: uppercase;
    overflow: hidden;
    transition: 0.5s;
    margin-top: 40px;
    letter-spacing: 4px;
  }
  
  .active-button a:hover {
    background: #2e7c52;
    color: #fff;
    border-radius: 5px;
    active-button-shadow: 0 0 5px #2e7c52, 0 0 25px #2e7c52, 0 0 50px #2e7c52,
      0 0 100px #2e7c52;
  }
  
  .active-button a span {
    position: absolute;
    display: block;
  }
  
  .active-button a span:nth-child(1) {
    top: 0;
    left: -100%;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, #2e7c52);
    animation: btn-anim1 1s linear infinite;
  }
  
  @keyframes btn-anim1 {
    0% {
      left: -100%;
    }
    50%,
    100% {
      left: 100%;
    }
  }
  
  .active-button a span:nth-child(2) {
    top: -100%;
    right: 0;
    width: 2px;
    height: 100%;
    background: linear-gradient(180deg, transparent, #2e7c52);
    animation: btn-anim2 1s linear infinite;
    animation-delay: 0.25s;
  }
  
  @keyframes btn-anim2 {
    0% {
      top: -100%;
    }
    50%,
    100% {
      top: 100%;
    }
  }
  .active-button a span:nth-child(3) {
    bottom: 0;
    right: -100%;
    width: 100%;
    height: 2px;
    background: linear-gradient(270deg, transparent, #2e7c52);
    animation: btn-anim3 1s linear infinite;
    animation-delay: 0.5s;
  }
  
  @keyframes btn-anim3 {
    0% {
      right: -100%;
    }
    50%,
    100% {
      right: 100%;
    }
  }
  
  .active-button a span:nth-child(4) {
    bottom: -100%;
    left: 0;
    width: 2px;
    height: 100%;
    background: linear-gradient(360deg, transparent, #2e7c52);
    animation: btn-anim4 1s linear infinite;
    animation-delay: 0.75s;
  }
  
  @keyframes btn-anim4 {
    0% {
      bottom: -100%;
    }
    50%,
    100% {
      bottom: 100%;
    }
  }
  